gecko/build/cl.py

103 lines
3.7 KiB
Python

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import ctypes
import os, os.path
import subprocess
import sys
from mozbuild.makeutil import Makefile
CL_INCLUDES_PREFIX = os.environ.get("CL_INCLUDES_PREFIX", "Note: including file:")
GetShortPathName = ctypes.windll.kernel32.GetShortPathNameW
GetLongPathName = ctypes.windll.kernel32.GetLongPathNameW
# cl.exe likes to print inconsistent paths in the showIncludes output
# (some lowercased, some not, with different directions of slashes),
# and we need the original file case for make/pymake to be happy.
# As this is slow and needs to be called a lot of times, use a cache
# to speed things up.
_normcase_cache = {}
def normcase(path):
# Get*PathName want paths with backslashes
path = path.replace('/', os.sep)
dir = os.path.dirname(path)
# name is fortunately always going to have the right case,
# so we can use a cache for the directory part only.
name = os.path.basename(path)
if dir in _normcase_cache:
result = _normcase_cache[dir]
else:
path = ctypes.create_unicode_buffer(dir)
length = GetShortPathName(path, None, 0)
shortpath = ctypes.create_unicode_buffer(length)
GetShortPathName(path, shortpath, length)
length = GetLongPathName(shortpath, None, 0)
if length > len(path):
path = ctypes.create_unicode_buffer(length)
GetLongPathName(shortpath, path, length)
result = _normcase_cache[dir] = path.value
return os.path.join(result, name)
def InvokeClWithDependencyGeneration(cmdline):
target = ""
# Figure out what the target is
for arg in cmdline:
if arg.startswith("-Fo"):
target = arg[3:]
break
if target == None:
print >>sys.stderr, "No target set" and sys.exit(1)
# Assume the source file is the last argument
source = cmdline[-1]
assert not source.startswith('-')
# The deps target lives here
depstarget = os.path.basename(target) + ".pp"
cmdline += ['-showIncludes']
cl = subprocess.Popen(cmdline, stdout=subprocess.PIPE)
mk = Makefile()
rule = mk.create_rule([target])
rule.add_dependencies([normcase(source)])
for line in cl.stdout:
# cl -showIncludes prefixes every header with "Note: including file:"
# and an indentation corresponding to the depth (which we don't need)
if line.startswith(CL_INCLUDES_PREFIX):
dep = line[len(CL_INCLUDES_PREFIX):].strip()
# We can't handle pathes with spaces properly in mddepend.pl, but
# we can assume that anything in a path with spaces is a system
# header and throw it away.
if ' ' not in dep:
rule.add_dependencies([normcase(dep)])
else:
sys.stdout.write(line) # Make sure we preserve the relevant output
# from cl
ret = cl.wait()
if ret != 0 or target == "":
sys.exit(ret)
depsdir = os.path.normpath(os.path.join(os.curdir, ".deps"))
depstarget = os.path.join(depsdir, depstarget)
if not os.path.isdir(depsdir):
try:
os.makedirs(depsdir)
except OSError:
pass # This suppresses the error we get when the dir exists, at the
# cost of masking failure to create the directory. We'll just
# die on the next line though, so it's not that much of a loss.
with open(depstarget, "w") as f:
mk.dump(f)
if __name__ == "__main__":
InvokeClWithDependencyGeneration(sys.argv[1:])